title: Separation of human immunodeficiency virus type 1 from motile sperm by the double tube gradient method versus other methods.
mesh_terms: D000328:Adult; D002469:Cell Separation / Q000379:methods; D018023:HIV Seronegativity; D015497:HIV-1 / Q000302:isolation & purification*; D006801:Humans; D008297:Male; D008875:Middle Aged; D012661:Semen / Q000821:virology*; D013081:Sperm Motility / Q000502:physiology*; D013094:Spermatozoa / Q000166:cytology / Q000821:virology*; D014773:Virology / Q000379:methods*